Questions tagged [connections]

One or more connections to a database or database server. For questions about *establishing* a connection, use the **connectivity** tag instead.

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21 views

Postgres memory usage grows over time, resets when clients restarted

I have a Postgres DB running on the same small server as some applications that use it. Immediately after restarting the applications, Postgres uses <100 MB memory. After a few days without ...
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How to connect Jira to remote PostgreSQL database? [closed]

I have installed Jira on my Windows 10 using local PostgreSQL, but now I have installed PostgreSQL on a VPS and want to connect my Jira to it. But I don't know how to change following configuration ...
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37 views

Why would the user matter when running a query?

I have a web page with a database lookup that contains multiple optional parameters. When I select a couple of parameters and run the query, it returns in less than two seconds. However, when ...
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113 views

How to see unclosed PostgreSQL connection while using psycopg2? [closed]

I run python code: con = psycopg2.connect(some_dsn) cur = con.cursor() cur.execute(some_sql) res = cur.fetchone() #con.close() <-- connection is not closed Then I try: ps auxf | grep postgres ...
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51 views

No Tables or Views Could be Loaded

Could not retrieve the table information for the connection manager 'Excel Connection Manager 3'. Failed to connect to the source using the connection manager 'Excel Connection Manager 3' How to ...
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77 views

SQL Server Encrypted Connections - Configuration Manager does not see Certificate

My goal is to implement encrypted connections on Test SQL Server instance First, tried to create self-signed certificate in the Certificates snap in (certlm.msc), Personal > All Tasks > Request New ...
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2answers
152 views

Queries on large database kill connection to the server, works with LIMIT

I'm trying to run queries on a large-ish database without killing the connection to the server. I'm using Postgres 12.1 on a mac with 16gb of memory, and about 40gb of free disk. The database is ...
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1answer
72 views

How many pool connection size should be set for a 1000 users Jira system?

For a Jira system, if use Jira's default connection configuration as below: <?xml version="1.0" encoding="UTF-8"?> <jira-database-config> <name>defaultDS</name> <...
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1answer
25 views

SQL*Loader and DC firewall timeout

We are loading a huge dataset using SQLLDR and there are index creation that lasts for a couple hours or even more. Firewall drops this connection as there is no data transfer during index creation ...
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1answer
43 views

Remote connection scheme without Windows Authentication/Domain in detail [closed]

There is a legacy C++ system that needs to be "translated", that uses ODBC for connecting to remote SQL Server Database. System is distributed to many different OS and different domains, some always ...
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29 views

Estimate of number of connections to a sql server instance

I want to get a proper or near accurate count for the number of connections in a sql server instance. I have been using different queries from internet and i see that some people use dmvs ,some people ...
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1answer
35 views

Audit logins and logouts [duplicate]

I need to trace and monitor client login connections (successful and failure) to our important SQL servers (20 MSSQL Server). What method do you recommend? Note: I think enabling "both failed and ...
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109 views

Same session ID(with same SQL text) but 3 different connection ids

I was listing out all sessions open in my sql server 2016 production server. I have issues with slow performance and i have been investigating it. I see that i have several same sessions(session_id) ...
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2answers
142 views

SSMS How do I open a new Query Window using Same Connection Instance of current Window

Coming from Oracle I have discovered that SSMS connects slightly different than Oracle's SQL Developer. Oracle you click ONE connection and then all tabs you open then use that Connection. SSMS ...
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446 views

How to connect using PDB userid on Oracle 18c XE?

I have created a PDB on Oracle 18c XE using following SQL command create pluggable database virlux admin user test1admin identified by test1pwd file_name_convert = ('/pdbseed/', '/test1/') ; Now, I ...
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1answer
190 views

Record MultiSubnetFailover value at connection?

With AlwaysOn, there are 3 options for the keyword MultiSubnetFailover True (yes) False (no) (example) Not sent/used Not all applications support it's use in connection strings. Not all vendor ...
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2answers
161 views

MySQL 5.6 — How do I tell if I need to increase innodb io thread setting?

I am trying to tune my mysql server for the high end system. We are using 16--32 core hosts with memory > 100GB. I have looked into a bunch of existing setting, but not sure if I need to tune up the ...
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1answer
146 views

User connections without a login

I was looking at SQL Server performance and noticed that CPU utilization goes high when the number of connections go high(I believe it is normal).Usually number of connections on an average was ...
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24 views

Mysql 8. Event call Stored Procedure with Transaction to Federated tables never finish ESTABLISHED connection until timeout

We have a Mysql server which connect to remote Mysql Federated tables and copy data to local tables. For several databases it works fine, but the new one did not close connection after Transaction ...
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1answer
52 views

ODBC connection with RD Gateway [closed]

here at my company, we use an RD Gateway server. that means when we want to access a server we have to set up the gateway in the connection...something like rdsgw.mycompany.com But, how could I do an ...
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18 views

how to change the driver of a ole_dbconnection from oracle_32bit to oracle_64bit

i have the connection string of: connection= new OleDbConnection("Provider=OraOLEDB.Oracle;UserId=userid;Password=password; Data Source=database;OLEDB.NET=true"); However after Oracle_64bit driver ...
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Aborted connections (Erros reading communication packets)

I set up a new Database Server over a SQL Dump with innoDB MYSQL 5.7 from MYSQL 5.6. The Server running external with many sleeping SMTP connections over 1 Mio a day. I made the server open for ...
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43 views

Is It Okay to Leave the Connection Open and Set CommandTimeout for Long Durations?

I have to process daily files and it's a long process that deletes, imports and updates processes. Like literally 20 to 30 minutes per file for several files a day. ** EDIT: I also have some ...
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Is sp_getapplock recommended for long running locks (> 10 minutes)?

I'm trying to get rid of a Redis dependency in our application. We notice that is worse for our uptime to have a dependency on both SQL and Redis, above the performance benefits Redis would give us. ...
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What is “direct client connections” to Oracle?

The Oracle document states: A read/write database instance, which is the default, can process DML and supports direct connections from client applications. In contrast, a read-only database ...
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102 views

MSSQL over the internet but we connect over RDP

We connect throguh RDP to our ERP solution which uses MSSQL 2008, right now I can see on windows logs and SQL logs that we have a HUGE amount of connection attempts to sa user and results in slow ...
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38 views

What is a connection in MySQL Workbench?

I've searched so much and still found no answer to what exactly a connection is. I'm a beginner and don't know how connecting to databases/servers works, so I can't move forward yet. What does the ...
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24 views

Way to check where the MySQL connection was initialized?

Is there a way to identify who created the MySQL connection? For example: in file a.php $conn = mysqli_connect($dbhost, $dbuser, $dbpwd, null, $port, $socket); I would like to know that this ...
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44 views

SQL Server DAC - Connection Issue

I am having a strange issue when trying to connect to my SQL Server instance remotely from my client computer. I am able to do this on my other instances by opening up a new Database Engine Query and ...
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25 views

Adding PostgreSQL data source to excel didn't ask for credentials other than server IP and database

I saw Excel supported using PostgreSQL as a data source. I'm used to using ODBC connections for Access so having direct Postgres support is exciting. When connecting I entered the Server IP and ...
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27 views

SQL Mirroring - Application not pointing to new Primary

Im stuck with a connection string issue this is my connection string. <add name="APP01" connectionString="Server=10.169.0.2; Failover Partner=10.166.0.2; Initial Catalog=DB2017; Integrated ...
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1answer
45 views

Mysql Connections are string when checking from SHOW STATUS LIKE '%onn%';

I have a Mysql db server which seems to be getting slow by time. When i am checking detail from SHOW STATUS LIKE '%onn%'; I get following details Variable_name Value ...
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1answer
33 views

MySQL Server :: My C Code can remotely create a database, but not “INSERT INTO” it

I’ve written a C program which does the following when it starts: Connects to a remote Linux MySQL server over the network Creates a new, uniquely-named database Sends a “USE _____” command to ...
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302 views

MySQL performance tuning related connection

I am running openstack cloud and it use mysql database which is MariaDB 10.1.30 I am sometime seeing connection reset from multiple clients, to trying to find out what is going on in database, I am ...
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310 views

PostgreSQL 11 and pgagent connection string issue

On PostgreSQL 11 running on Windows 2012 server, I created a job with pgagent and pgAdmin4. In the step, in connection string I used the password parameter and it works. Instead, I would like to use ...
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790 views

How do I do an ODBC connection to ORACLE from SSIS/ Visual studio?

Despite that OLE Db and ADO.NET are newer than ODBC potentially, I've heard that ODBC connections to Oracle are potentially faster within SSIS. So --- I'm trying to set up a simple ODBC connection to ...
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How to deny access to SQL Server to certain login over SSMS, but allow over .Net SqlClient Data Provider

We have a situation where Developers do not have any UPDATE permissions, BUT they work with applications and see connection strings -> they know passwords from some SQL accounts (example SQLLogin1) ...
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1answer
256 views

MySQL stalls and strange threads/connections behavior is observed

We have a MySQL instance which most of the time works just fine. From time to time, however, we observe strange behavior. What happens is that suddenly MySQL connections reach the limit (currently set ...
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652 views

Are CNAME aliases for connection strings a good idea?

To be very flexible and move database to different servers more easily, we came up with the idea of using an alias per database. So by simply changing a DNS entry, we can route all queries to a ...
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451 views

pg_dump: Write failed: Connection reset by peer

we are trying to move all database data to other location. we chose to perform pg_dump and we encountered few problems: first was out of memory problem: during pg_dump initialization we get an error: ...
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1answer
578 views

Can't connect to MS SQL Server via IP address anymore

I'm using a PLC connected to a laptop (over EthernetIP). The development software for programming the PLC has a built in settings page for connecting it to various database engines (MySQL, PostgreSQL, ...
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2k views

“Keyword not supported: Server” error when using ADO.NET connection string to connect to Azure DB

I have an ASP.Net project that I am running. I have added a database to Azure, and Azure generated a connection string for the database. When running the application I however get an error stating ...
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3answers
2k views

Database Connection vs Raw TCP Connection [closed]

I have some fundamental questions about how database clients & database interact Do databases support multiple transactions simultaneously on a single database connection from client? If not, why ...
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3k views

Keep H2 in-memory database between connections

I create and use a H2 database in-memory (no writing to storage) for demos and quick tests using this code in Java: Connection conn = DriverManager.getConnection( "jdbc:h2:mem:example_db" ) ; This ...
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2k views

Switching users in PgAdmin

I'm looking for a way to enable switching between users in pgAdmin 4. I'm aware of the possibilty to change user from the properties-dialog before connecting. However this isn't useful when I'm ...
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2answers
398 views

What is purpose of `ALLOW_CONNECTIONS` being set so no one can connect to the new Postgres database?

In Postgres 11, the CREATE DATABASE command that makes a new catalog has an option ALLOW_CONNECTIONS. The documentation says this option can be used to block all connections to the database: [ ...
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1answer
582 views

Can `listen_addresses` system configuration setting in Postgres stop pre-authentication exploits?

You can set various configuration parameters for Postgres by either editing the postgresql.conf file manually or by calling ALTER SYSTEM commands. One of those config settings is listen_addresses. ...
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112 views

MySQL: No. of Connections

I have a medium sized database (7 GB) with around 200 concurrent users. I am getting some database lag issues, suddenly my node-mysql client freezes during selects and inserts. As a process of ...
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1answer
109 views

What connection do internal sessions belong to in MS SQL Server?

By querying select * from sys.dm_exec_connections I do not see corresponding connections for internal sessions, about the existance of which I know from sys.dm_exec_sessions DMV. My questions is ...
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1answer
50 views

database connection and sessions in an example of social media

I am referring to MS SQL connection and sessions. I know that each application should make a connection in order to access the database, and each connection can have multiple sessions. In case of a ...